{"id":"https://openalex.org/W2107973666","doi":"https://doi.org/10.1109/mcom.2009.4907417","title":"The design of a highly available enterprise ip telephony network for the power utility of Serbia company","display_name":"The design of a highly available enterprise ip telephony network for the power utility of Serbia company","publication_year":2009,"publication_date":"2009-04-01","ids":{"openalex":"https://openalex.org/W2107973666","doi":"https://doi.org/10.1109/mcom.2009.4907417","mag":"2107973666"},"language":"en","primary_location":{"id":"doi:10.1109/mcom.2009.4907417","is_oa":false,"landing_page_url":"https://doi.org/10.1109/mcom.2009.4907417","pdf_url":null,"source":{"id":"https://openalex.org/S158797327","display_name":"IEEE Communications Magazine","issn_l":"0163-6804","issn":["0163-6804","1558-1896"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Communications Magazine","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5009645915","display_name":"N. Krajnovic","orcid":null},"institutions":[{"id":"https://openalex.org/I4068193","display_name":"University of Belgrade","ror":"https://ror.org/02qsmb048","country_code":"RS","type":"education","lineage":["https://openalex.org/I4068193"]}],"countries":["RS"],"is_corresponding":true,"raw_author_name":"Nenad Krajnovic","raw_affiliation_strings":["University of Belgrade, Serbia","Fac. of Electr. Eng., Univ. of Belgrade, Belgrade"],"affiliations":[{"raw_affiliation_string":"University of Belgrade, Serbia","institution_ids":["https://openalex.org/I4068193"]},{"raw_affiliation_string":"Fac. of Electr. Eng., Univ. of Belgrade, Belgrade","institution_ids":["https://openalex.org/I4068193"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5009645915"],"corresponding_institution_ids":["https://openalex.org/I4068193"],"apc_list":null,"apc_paid":null,"fwci":0.2991,"has_fulltext":false,"cited_by_count":11,"citation_normalized_percentile":{"value":0.63511101,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"47","issue":"4","first_page":"118","last_page":"122"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10651","display_name":"IPv6, Mobility, Handover, Networks, Security","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10651","display_name":"IPv6, Mobility, Handover, Networks, Security","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10575","display_name":"Wireless Communication Networks Research","score":0.9854999780654907,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12203","display_name":"Mobile Agent-Based Network Management","score":0.9745000004768372,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/softswitch","display_name":"Softswitch","score":0.8344404697418213},{"id":"https://openalex.org/keywords/voice-over-ip","display_name":"Voice over IP","score":0.8034052848815918},{"id":"https://openalex.org/keywords/failover","display_name":"Failover","score":0.7821803092956543},{"id":"https://openalex.org/keywords/trunking","display_name":"Trunking","score":0.7271185517311096},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.712882399559021},{"id":"https://openalex.org/keywords/switchover","display_name":"Switchover","score":0.6828325986862183},{"id":"https://openalex.org/keywords/telephony","display_name":"Telephony","score":0.6503869891166687},{"id":"https://openalex.org/keywords/call-control","display_name":"Call control","score":0.6466304063796997},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.6266524791717529},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.5635862350463867},{"id":"https://openalex.org/keywords/sip-trunking","display_name":"SIP trunking","score":0.5582192540168762},{"id":"https://openalex.org/keywords/interoperability","display_name":"Interoperability","score":0.49474021792411804},{"id":"https://openalex.org/keywords/telephone-network","display_name":"Telephone network","score":0.4463629722595215},{"id":"https://openalex.org/keywords/next-generation-network","display_name":"Next-generation network","score":0.42847979068756104},{"id":"https://openalex.org/keywords/the-internet","display_name":"The Internet","score":0.20326465368270874},{"id":"https://openalex.org/keywords/mobile-radio-telephone","display_name":"Mobile radio telephone","score":0.13164451718330383},{"id":"https://openalex.org/keywords/operating-system","display_name":"Operating system","score":0.13054388761520386},{"id":"https://openalex.org/keywords/telephone-line","display_name":"Telephone line","score":0.10300964117050171}],"concepts":[{"id":"https://openalex.org/C84734044","wikidata":"https://www.wikidata.org/wiki/Q533360","display_name":"Softswitch","level":5,"score":0.8344404697418213},{"id":"https://openalex.org/C171246234","wikidata":"https://www.wikidata.org/wiki/Q81945","display_name":"Voice over IP","level":3,"score":0.8034052848815918},{"id":"https://openalex.org/C109751979","wikidata":"https://www.wikidata.org/wiki/Q998767","display_name":"Failover","level":2,"score":0.7821803092956543},{"id":"https://openalex.org/C151395432","wikidata":"https://www.wikidata.org/wiki/Q1020782","display_name":"Trunking","level":2,"score":0.7271185517311096},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.712882399559021},{"id":"https://openalex.org/C124200919","wikidata":"https://www.wikidata.org/wiki/Q2373346","display_name":"Switchover","level":2,"score":0.6828325986862183},{"id":"https://openalex.org/C195358072","wikidata":"https://www.wikidata.org/wiki/Q944584","display_name":"Telephony","level":2,"score":0.6503869891166687},{"id":"https://openalex.org/C131969451","wikidata":"https://www.wikidata.org/wiki/Q5021614","display_name":"Call control","level":2,"score":0.6466304063796997},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.6266524791717529},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.5635862350463867},{"id":"https://openalex.org/C174255183","wikidata":"https://www.wikidata.org/wiki/Q3943657","display_name":"SIP trunking","level":4,"score":0.5582192540168762},{"id":"https://openalex.org/C20136886","wikidata":"https://www.wikidata.org/wiki/Q749647","display_name":"Interoperability","level":2,"score":0.49474021792411804},{"id":"https://openalex.org/C197698232","wikidata":"https://www.wikidata.org/wiki/Q2354216","display_name":"Telephone network","level":2,"score":0.4463629722595215},{"id":"https://openalex.org/C110994511","wikidata":"https://www.wikidata.org/wiki/Q661020","display_name":"Next-generation network","level":3,"score":0.42847979068756104},{"id":"https://openalex.org/C110875604","wikidata":"https://www.wikidata.org/wiki/Q75","display_name":"The Internet","level":2,"score":0.20326465368270874},{"id":"https://openalex.org/C155207387","wikidata":"https://www.wikidata.org/wiki/Q789202","display_name":"Mobile radio telephone","level":4,"score":0.13164451718330383},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.13054388761520386},{"id":"https://openalex.org/C111943024","wikidata":"https://www.wikidata.org/wiki/Q1373572","display_name":"Telephone line","level":3,"score":0.10300964117050171}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/mcom.2009.4907417","is_oa":false,"landing_page_url":"https://doi.org/10.1109/mcom.2009.4907417","pdf_url":null,"source":{"id":"https://openalex.org/S158797327","display_name":"IEEE Communications Magazine","issn_l":"0163-6804","issn":["0163-6804","1558-1896"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Communications Magazine","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/9","score":0.6399999856948853,"display_name":"Industry, innovation and infrastructure"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320334771","display_name":"Science and Engineering Research Board","ror":"https://ror.org/03ffdsr55"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W2085007813","https://openalex.org/W2086513166"],"related_works":["https://openalex.org/W2156922599","https://openalex.org/W2380454897","https://openalex.org/W1972017595","https://openalex.org/W2360311930","https://openalex.org/W2481145384","https://openalex.org/W3144716924","https://openalex.org/W2367932322","https://openalex.org/W2355665785","https://openalex.org/W2590546040","https://openalex.org/W2107973666"],"abstract_inverted_index":{"The":[0,18,93],"Power":[1,113],"Utility":[2,114],"of":[3,10,34,85,102,111,115,132,141,154,187,198],"Serbia":[4,116],"Company":[5,117],"intends":[6],"to":[7,16,58,127,136,228],"migrate":[8],"portions":[9],"its":[11],"time-division-multiplexing-":[12],"based":[13,42],"telephony":[14],"network":[15,81],"IP.":[17],"high-level,":[19],"capital":[20],"project":[21],"requirements":[22],"include:":[23],"(a)":[24],"building":[25],"a":[26,60,73,77,123,133,138,155],"new":[27,40,50,61,167],"VoIP":[28,41],"infrastructure;":[29],"(b)":[30],"exchanging":[31],"approximately":[32],"one-third":[33],"the":[35,53,86,91,96,109,112,163,177,185,196],"existing":[36,55],"TDM-based":[37],"PBXs":[38,51,57,165],"with":[39,52,184],"and":[43,46,105,166,238],"hybrid":[44,62],"PBXs;":[45],"(c)":[47],"integrating":[48,162],"these":[49,229],"remaining":[54],"legacy":[56,164],"create":[59],"network.":[63,119],"Telephony":[64],"service":[65,193],"availability":[66],"should":[67],"be":[68,128],"five":[69],"nines":[70],"(99.999":[71],"percent),":[72],"requirement":[74,79,135],"that":[75,183,232],"created":[76],"derived":[78],"for":[80,99],"element":[82],"redundancy.":[83],"One":[84],"most":[87,129],"important":[88],"elements":[89],"is":[90,95,215],"softswitch.":[92],"softswitch":[94],"equipment":[97,197],"responsible":[98],"call":[100],"control":[101],"IP":[103],"phones":[104],"voice":[106],"gateways":[107],"at":[108],"level":[110],"telephone":[118],"Softswitch":[120],"redundancy":[121],"in":[122],"failover":[124],"configuration":[125],"proved":[126],"challenging":[130],"because":[131],"performance":[134],"achieve":[137],"switchover":[139,152],"time":[140],"six":[142],"seconds":[143],"or":[144],"less,":[145],"whereas":[146],"commercially":[147],"available":[148],"softswitches":[149],"typically":[150,205],"support":[151],"times":[153],"few":[156],"minutes.":[157],"Another":[158],"significant":[159],"challenge":[160],"was":[161,201],"(VoIP)":[168],"PBXs.":[169],"Although":[170],"industry":[171],"marketing":[172],"promotes":[173],"SIP":[174,213],"trunking":[175,214],"as":[176,208],"preferred":[178],"integration/interconnection":[179],"method,":[180],"we":[181],"found":[182],"exception":[186],"bearer":[188],"traffic":[189],"(voice":[190],"media)":[191],"pathing,":[192],"interoperability":[194,220],"between":[195],"different":[199],"vendors":[200],"often":[202],"problematic.":[203],"Vendors":[204],"suggest":[206],"Q.Sig":[207],"an":[209],"interconnection":[210],"alternative":[211],"when":[212],"infeasible,":[216],"but":[217],"some":[218],"vendor":[219],"problems":[221],"persisted.":[222],"This":[223],"article":[224],"presents":[225],"technical":[226],"solutions":[227],"major":[230],"issues":[231],"can":[233],"benefit":[234],"similar":[235],"TDM-to-IP":[236],"migration":[237],"hybridization":[239],"projects.":[240]},"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":4},{"year":2012,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
